I put a couple hundred pics on this thumb drive and I have no problems accessing any part of the drive. The only problem is all the programs I have for viewing jpegs say that about half of them can't be read. My computer identifies them as jpegs, but half (and they all came from the same road trip using the same phone (Samsung S7) to snap the pics with) say that can't be read.
When I try to open them in Adobe Photoshop I get a message saying "Could not complete your request because an unknown or invalid JPEG marker type is found." I have no idea what they mean. Here is one of the good files:
But I see no way to upload one of the jpegs that can't be recognized.
I'm fairly confident the drive is in good working order. I copied them from the Samsung S7 to the drive. I have other pics on my computer from the same camera and none have the problem. But like I said, I can't find any bad sectors or problems with my thumb drive.